Poznań · AutumnMonth summary
Poznań weather in September
✅ Good
🌡️ Temperature min / max
12°C – 20°C
🌧 Rainy days
26% of days
☀️ Sunshine
9.1h per day on average
🌊 🌊 Season
Autumn
⭐ ⭐ Weather score
7.8/10
📅 📅 Best month
August (8.4/10)
Quick decision
Should you visit Poznań in September?
✅ Good
✅ Yes if: you want to explore the city on foot without suffering from heat.
❌ No if: you're looking for a beach destination — water and air are still cool.
Our take: September is a good time to visit Poznań. August remains slightly better (+0.6 pts).
By trip type
Poznań in September by trip type
- 🏙️ 🏙️ City break / culture : ✅ Good
- 🚶 🚶 Outdoor activities : ✅ Good
- 🏖️ Beach / swimming : — No sea access
- 💰 💰 Budget : 💸 Peak season
Local context
What to expect in September
Autumn in Poznań is often underrated: 20°C, golden light and declining crowds. An interesting window. Expect rain on 26% of days — a light raincoat in the bag is recommended. A good balance between weather and crowds, even if August (8.4/10) remains theoretically better.
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All months for Poznań
Annual table
Month-by-month comparison
| Month | Min °C | Max °C | Rain % | Precip mm | Sun h/d | Score |
|---|---|---|---|---|---|---|
| 🌨️ January | -1°C | 3°C | 41% | 47.8 | 3.0h | 4.8/10 |
| 🌫️ February | 0°C | 6°C | 32% | 41.2 | 5.8h | 5.7/10 |
| 🌫️ March | 1°C | 9°C | 33% | 40.7 | 6.9h | 6.6/10 |
| ⛅ April | 4°C | 13°C | 32% | 38.8 | 9.7h | 7.0/10 |
| 🌤️ May | 9°C | 18°C | 32% | 58.1 | 10.9h | 7.4/10 |
| 🌤️ June | 14°C | 24°C | 35% | 61.1 | 12.5h | 8.2/10 |
| 🌤️ July | 15°C | 25°C | 36% | 68.6 | 11.8h | 8.3/10 |
| 🌤️ August | 15°C | 25°C | 32% | 64.9 | 10.6h | 8.4/10 |
| 🌤️ September | 12°C | 20°C | 26% | 43.7 | 9.1h | 7.8/10 |
| ⛅ October | 7°C | 14°C | 35% | 54.5 | 5.7h | 7.0/10 |
| 🌫️ November | 3°C | 8°C | 28% | 38.1 | 3.6h | 6.7/10 |
| 🌨️ December | 0°C | 4°C | 34% | 45.3 | 2.6h | 5.2/10 |
Ideal
Fair
Challenging climate
◀ Current month · Source Open-Meteo · 10 years
📊 Data source
Data based on 10 years of ERA5 records via Open-Meteo, with ECMWF seasonal adjustment. In September, Poznań averages 20°C, 26% rainy days and 9.1h of sunshine per day. Overall weather score: 7.8/10.
See methodology →
Comparison
September vs August (best month)
The best month is August (score 8.4/10). Difference:
- 🌡️ Max temperature : +5°C
- 🌧 Rainy days : +6%
- ☀️ Sunshine : +1.5h/day
FAQ
FAQ — Poznań in September
Is September a good time to visit Poznań?
September is an excellent time to visit Poznań (score 7.8/10). With 20°C, 9.1h of sunshine and 26% rain, conditions are very favourable.
What to do in Poznań in September?
With 20°C max and 9.1h of sunshine, focus on cultural sites, museums and local gastronomy.
Accommodation
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Activities & tours
Activities and tours in Poznań
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